Synonyms for Desperate:

adj.

all (adjective)
heroic.
destructive (adjective)
violent.
extreme (adjective)
extreme, great, urgent, drastic, acute.
extreme, intense (adjective)
critical, dire, urgent, crucial, climacteric, vehement, drastic, fierce, great, acute.
hopeless (adjective)
disheartened, despairing, anguished, glum, dispirited, miserable, dejected, hopeless, depressed, pessimistic, sad, bleak, despondent, gloomy, dismal, downhearted, spiritless, morose, forlorn, discouraged, desirous, melancholy, cheerless.
last-ditch (adjective)
do-or-die.
reckless (adjective)
incautious, rash, wild, frantic, careless.
reckless, outrageous (adjective)
incautious, furious, rash, frantic, dangerous, careless, violent, wild.

n.

rigorous, serious, severe, profound, grave. hope, anxious, be dying for something/to do something, keen, hungry, in need of something, longing, impatient, in the hope that/of. annoyed, upset, belligerent, fed up, irritated, safety, crucial, displeased, cross, put out, climacteric, mad, angry, acute. commemorative, intense, lame, hostile, maiden, lamely, attempted, violent, face saving, strong, fierce, big, amateur, furious, vehement, limp. desperate (noun)
dangerous, unsafe, critical, despairing, resolute, imperative, fearless, hopeless, dire, brave, do-or-die, courageous, heroic.

Other synonyms:

fierce, lamely, severe, keen, commemorative, face saving, limp, maiden, rigorous, attempted. intense, profound, vehement, extreme, crucial. lame, furious, grave. amateur, hostile. violent. strong. crucial
acute.
frenzied
frantic.
Other relevant words:
heroic, fearless, cross, rigorous, climacteric, crucial, brave, critical, severe, courageous, resolute, dire, big, hope, longing, lame, keen, serious, desirous, do-or-die, upset, annoyed, unsafe, amateur, dangerous, intense, hungry, attempted, hostile, imperative, vehement, urgent, rash, commemorative, lamely, drastic, careless, great, mad, limp, impatient, anxious, incautious, safety, wild, fierce, maiden, belligerent, irritated, sad, grave, violent, strong, frantic, angry, furious, acute, profound, extreme, displeased.

Usage examples for desperate

  1. For he has a great heart, the greatest heart that ever man had in the world; also he is sudden to change, as I know very well; and the sight of me denied him might move him to a desperate act, as once before it did. – The Life and Death of Richard Yea-and-Nay by Maurice Hewlett
  2. And after I had sent them in, I could not keep away from the places where they were, but felt as if they were more hopeful and less desperate when I was near them. – Great Expectations by Charles Dickens
  3. When the day drew near, and only a few tickets had been sold, Clemens was desperate – Mark Twain, A Biography, 1835-1910, Complete The Personal And Literary Life Of Samuel Langhorne Clemens by Albert Bigelow Paine Last Updated: February 20, 2009